import axios from 'axios'
import { Message } from 'element-ui'
import store from '@/store'
import router from '@/router/index'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['Authorization'] = `Bearer ${store.getters.token}`
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    // const res = response.data
    // 打印结果
    //     code: 10000
    // data: "cd97e09d-52d7-4e12-b726-a0900af28bf1"
    // message: "操作成功！"
    // success: true
    // console.log(res)
    // 如果不再此处结构,虽然请求发送成功,但是会报错,需要结构
    const { success, message, data } = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (success) {
      return data
    } else {
      return Promise.reject(new Error(message))
    }
  },
  error => {
    console.dir(error) // for debug
    if (error.response && error.response.status === 401) {
      // 如果token过时,登出并且清除token和用户信息
      // 而且跳到登录页
      store.dispatch('user/logout')
      router.replace(`/login?redirect=${router.currentRoute.path}`)
    }
    Message({
      message: error.message,
      type: 'error',
      duration: 3 * 1000
    })
    return Promise.reject(error)
  }
)

export default service
